A professor of business statistics is about to begin work
A professor of business statistics is about to begin work on a new research project. Because his time is quite limited, he has developed a PERT/CPM critical path, which consists of the following activities:
1. Conduct a search for relevant research articles.
2. Write a proposal for a research grant.
3. Perform the analysis.
4. Write the article and send to journal.
5. Wait for reviews.
6. Revise on the basis of the reviews and resubmit.
The mean (in days) and variance of the completion times are as follows


Compute the mean and variance of the completion time of the entireproject.
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